JP7055923B1 - Quenching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a work holding member holding a heated work to be uniformly cooled and hardened in the coolant when the work is quenched by immersing the work holding member in the coolant. SOLUTION: A work holding member H holding a heated work W is immersed in a coolant X housed in a coolant tank 12 provided under a quenching chamber 11 by an elevating device 20 for quenching. The rotary pedestal 36 that holds the work holding member immersed in the coolant by the elevating device, the rotary arm 34 to which the rotary cradle is rotatably attached, and the work that is held by the rotary cradle by rotating the rotary arm. It is provided with a rotation mechanism that revolves the holding member along the orbital trajectory in the coolant tank and a rotation mechanism that rotates the rotary pedestal rotatably attached to the rotary arm. [Selection diagram] Fig. 5

Description

In the present invention, the work heated in the heat treatment furnace is held by the work holding member, and the work holding member is immersed in the cooling liquid contained in the cooling liquid tank provided in the lower part of the quenching chamber, and is immersed in the work holding member. It relates to a quenching device that cools and quenches a held work. In particular, when quenching the work held by the work holding member as described above, the work is uniformly cooled in the coolant so that the work can be quenched, and the work holding member holds a plurality of works and quenches. Also, each work is characterized in that it can be cooled uniformly in the coolant.

Conventionally, a work heated in a heat treatment furnace is immersed in a coolant contained in a coolant tank provided in the lower part of a quenching chamber to cool the work and quench it.

Then, when the work thus heated is immersed in the cooling liquid contained in the cooling liquid tank provided at the lower part of the quenching chamber and quenched, conventionally, the heat-treated work is placed in the quenching chamber. The work placed on the support member provided is placed on the support member, the support member is lowered by the elevating means, and the work placed on the support member is cooled by being housed in the coolant tank provided in the lower part of the quenching chamber. It is immersed in the liquid and the cooling liquid in the cooling liquid tank is circulated to cool the work and quench it.

Here, in cooling the work by circulating the coolant in the coolant tank in this way, it is preferable to increase the speed at which the work is cooled and reduce the distortion of the work to be cooled.

Then, when the work is cooled by circulating the coolant in the coolant tank as described above, in order to quickly cool the heated work, if the speed at which the coolant is circulated is increased, the flow velocity of the coolant increases. There is a problem that the strain tends to be non-uniform, and the strain generated in the work increases because only one side of the work, which is the contact side with the flow direction of the coolant, is cooled quickly.

Further, conventionally, a work holding member holding a heated work is immersed in a coolant contained in a coolant tank, and this work holding member is placed on the peripheral wall of the coolant tank in the coolant in the coolant tank. The work is cooled by revolving in a circular orbit along the line and increasing the distance at which the work held by the work holding member is brought into contact with the coolant.

However, when the work holding member is revolved in the coolant in an orbit along the peripheral wall of the coolant tank as described above to bring the work held by the work holding member into contact with the coolant, the orbit The speed on the outer peripheral side becomes faster than the speed on the inner peripheral side of the work, and the outer peripheral side of the work held by the work holding member is cooled faster than the inner peripheral side of the work. There is a problem that only the front side of the work is cooled quickly, the cooling of the work becomes uneven, and the work is distorted.

Further, conventionally, as shown in Patent Document 1, a plurality of work holders that individually hold the work in a fixed posture are arranged on a circular orbit along a horizontal plane at a predetermined pitch, and the work is heated. Each work holding body holding the work is moved downward by an elevating mechanism in the work loading area, and each work held by each work holding body is immersed in the cooling liquid stored in the coolant tank, and each of the above-mentioned works is immersed. The holding body is circulated (revolved) along the orbital trajectory by a moving mechanism, and the work held by each work holding body is cooled by contacting a large amount of the coolant stored in the coolant tank, and the work is cooled. It has been proposed that the work holder is moved upward by an elevating mechanism in the work pulling area and taken out.

Further, in Patent Document 1, it is shown that in order to cool the work held by the work holding body, the quenching oil is individually injected from the injection member to the work held by each work holding body. There is.

However, in what is referred to in Patent Document 1, an elevating device that individually raises and lowers each work holder holding a work, and a work held by each work holder is individually injected with quenching oil from an injection member. In order to require a device for this, a large number of devices are required, the control of each device becomes very complicated and costly, and the work held by each work holder is cooled individually. , It was difficult to efficiently cool multiple workpieces.

Further, in Patent Document 2, when the heated work is immersed in the quenching oil injected into the quenching chamber to cool the work, the work immersed in the quenching oil is placed in the quenching oil by a work elevating device. It is shown that it is moved up and down to cool it.

However, as shown in Patent Document 2, when a work immersed in quenching oil is moved up and down in the quenching oil, the distance to move up and down is limited, and the speed of moving up and down is also limited, and further up and down. At the time of switching the motion, the work was momentarily stopped at the rising end and the falling end, and it was difficult to quickly cool the heated work.

Japanese Patent No. 5616728 Japanese Patent No. 65333146

In the present invention, the work heated in the heat treatment furnace is held by the work holding member, and the work holding member is immersed in the cooling liquid contained in the cooling liquid tank provided in the lower part of the quenching chamber, and is immersed in the work holding member. An object of the present invention is to solve the above-mentioned problems in the case of cooling and quenching the held work.

Then, in the present invention, the work heated as described above is held by the work holding member, and the work holding member is immersed in the cooling liquid contained in the cooling liquid tank provided in the lower part of the quenching chamber. When cooling and quenching the work held by the work holding member, the work held by the work holding member can be uniformly cooled and hardened in the coolant, and in particular, a plurality of works are held by the work holding member. It is an object of the present invention to enable each work to be uniformly cooled in the coolant even in the case of quenching.

In the quenching apparatus according to the present invention, in order to solve the above-mentioned problems, the heated work is held by the work holding member in the coolant contained in the coolant tank provided in the lower part of the quenching chamber. In a quenching device that cools the work held in the work holding member in a coolant and quenches it, the work holding member is moved up and down in the quenching chamber, and the heated work held in the work holding member is moved up and down. While immersing in the coolant in the coolant tank holding the In the coolant tank, the rotary pedestal for holding the member, the rotary arm to which the rotary cradle is rotatably attached, and the work holding member held by the rotary cradle by rotating the rotary arm. It is provided with a rotation mechanism that revolves along a circular orbit and a rotation mechanism that rotates the rotary cradle rotatably attached to the rotary arm.

Then, in the quenching device of the present invention, the work holding member holding the heated work is immersed in the coolant in the coolant tank by the elevating device and held on the rotary pedestal, and the rotary pedestal is used. The rotary arm rotatably attached is rotated by a rotary mechanism to rotate the work holding member held on the rotary pedestal along the circumferential trajectory in the coolant tank, and the rotary pedestal is rotated by the rotation mechanism. To rotate on its axis. In this way, the work holding member held by the rotary pedestal that is revolved along the orbital trajectory in the coolant tank by the rotary arm rotated by the rotary mechanism becomes the rotary cradle as the rotary cradle rotates. The position on the inner peripheral side and the position on the outer peripheral side of the work holding member to be revolved changes by rotating together with, and each position of the work held by the work holding member comes into contact with the coolant in the coolant tank. Since the rotation distance is equalized and the work rotates, the position of strong contact with the coolant changes continuously, and the work unit can be cooled more uniformly than the entire circumference, so that it can be used as a work holding member. The held work will be cooled evenly in the coolant.

Here, in the quenching device according to the present invention, it is possible to make the work holding member hold a plurality of works. Even when a plurality of workpieces are held by the workpiece holding member in this way, the rotary pedestal revolves along the circumferential trajectory in the coolant tank by the rotary arm rotated by the rotary mechanism as described above. The held work holding member rotates together with the rotating pedestal as the rotating pedestal rotates, and the position on the inner peripheral side and the outer peripheral side of the revolved work holding member changes to hold the work. In each of the plurality of workpieces held by the member, the distance of contact with the coolant in the coolant tank and rotation is equalized, and since the workpiece rotates, the position of strong contact with the coolant is continuously changed. Therefore, since the work unit can be cooled uniformly from the entire circumference, each work held by the work holding member is uniformly cooled in the coolant.

Further, in the quenching device of the present invention, when rotating the rotary cradle rotatably attached to the rotary arm as described above, the rotation mechanism includes, for example, a fixed shaft that rotatably holds the rotary arm. And the rotation transmission member can be provided between the rotation arm and the rotation cradle rotatably attached to the rotation arm.

Then, as the rotation transmission member, for example, a sprocket is provided on the rotation pedestal and the fixed shaft, respectively, and a chain is hung between the sprocket provided on the fixed shaft and the sprocket provided on the rotation pedestal. Can be provided.

Further, in the quenching device of the present invention, when the work holding member held on the rotary cradle is revolved along the circumferential trajectory in the coolant tank by the rotary arm, the rotary arm is cooled by the rotary mechanism. It can be rotated horizontally in the tank so that the work holding member held on the rotary cradle revolves in the coolant tank along the horizontal orbit. The rotary arm is rotated in the coolant tank in the vertical direction by the above-mentioned rotation mechanism, and the work holding member held on the rotary cradle is revolved in the coolant tank along the orbital trajectory in the vertical direction. You can also do it.

In the quenching device of the present invention, the work holding member holding the heated work as described above is immersed in the coolant in the coolant tank by the elevating device and held on the rotary pedestal, and the rotary receiver is held. The rotary arm to which the pedestal is rotatably attached is rotated by a rotary mechanism to revolve the work holding member held by the rotary pedestal along the circumferential trajectory in the coolant tank, and the rotary pedestal is rotated. Since it is rotated by the rotation mechanism, the work holding member held by the rotation pedestal that is revolved along the orbital trajectory in the coolant tank by the rotation arm rotated by the rotation mechanism is accompanied by the rotation of the rotation pedestal. The position on the inner peripheral side and the position on the outer peripheral side of the work holding member that is revolved by rotating together with the rotary cradle changes, and each position of the work held by the work holding member is in the coolant tank. The distance of rotation in contact with the coolant is equalized, and the work held by the work holding member is evenly cooled in the coolant.

As a result, in the quenching apparatus of the present invention, the work held by the work holding member can be uniformly cooled and hardened in the coolant, and in particular, a plurality of works are held by the work holding member and hardened. Even in this case, each work can be uniformly cooled in the coolant and quenched.

In the quenching apparatus according to the embodiment of the present invention, a state in which a plurality of workpieces heated in the heat treatment furnace are held by the work holding member and the work holding member is guided to a position facing the extraction chamber in the quenching chamber is shown. It is a cross-sectional explanatory view seen from. In the quenching apparatus according to the above-described embodiment, a work holding member holding a plurality of heated workpieces is guided from a heat treatment furnace to an extraction chamber in a quenching chamber, and is placed on a pair of elevating receiving portions that are elevated by the elevating device. It is sectional drawing on the side surface side which showed the held state. In the quenching device according to the above-described embodiment, the pair of elevating receiving portions holding the work holding member is lowered by the elevating device and introduced into the coolant contained in the coolant tank, and is introduced into the pair of elevating receiving portions. In the cross-sectional explanatory view on the side surface showing a state in which the held work holding member is held on a rotary pedestal provided at the end of a rotary arm that is rotated horizontally around a rotary shaft portion. be. In the quenching device according to the above-described embodiment, the pair of elevating receiving portions holding the work holding member is lowered by the elevating device and introduced into the coolant contained in the coolant tank, and is introduced into the pair of elevating receiving portions. In the cross-sectional explanatory view on the front side showing the state in which the held work holding member is held on the rotary pedestal provided at the end of the rotary arm that is rotated in the horizontal direction around the rotary shaft portion. be. In the quenching apparatus according to the above embodiment, in (A) to (D), the rotary arm is rotated in the horizontal direction, and the work holding member held on the rotary cradle is placed in the coolant of the coolant tank. A state in which the work holding member held on the rotary pedestal is rotated once in the direction opposite to the revolution direction around the rotary support axis of the rotary pedestal while rotating one revolution along the orbital trajectory in the horizontal direction. It is a cross-sectional explanatory view seen from above. In the quenching device according to the above embodiment, the gear ratios of the sprocket provided on the fixed shaft and the sprocket provided on the rotating shaft portion of the rotary cradle are changed, and the examples are (A) to (D). Rotates the rotary arm in the horizontal direction to revolve the work holding member held by the rotary pedestal in the coolant of the coolant tank in the horizontal direction along the orbital trajectory. It is a cross-sectional explanatory view which looked at the state which the work holding member held on the top is rotated by two rotations in the direction opposite to the rotation direction about the rotation support shaft of a rotation pedestal.

Hereinafter, the quenching apparatus according to the embodiment of the present invention will be specifically described with reference to the accompanying drawings. The quenching apparatus according to the present invention is not limited to the one shown in the following embodiment, and can be appropriately modified and implemented without changing the gist of the invention.

Here, in the quenching apparatus of this embodiment, as shown in FIG. 1, a plurality of works W (Wa to Wd) heated in the heat treatment furnace 1 are held by the work holding member H, and the work holding member H is held. It leads to the extraction chamber 11 in the quenching chamber 10, and as shown in FIG. 2, the door 1a of the heat treatment furnace 1 is opened so that the heat treatment furnace 1 leads to the extraction chamber 11 in the quenching chamber 10. The number of works W to be held on the work holding member H is not limited, and even if only one is used, more works W can be held.

Here, in the quenching apparatus of this embodiment, a coolant tank 12 in which the coolant X is housed is provided in the lower part of the extraction chamber 11 in the quenching chamber 10, and the extraction chamber in the quenching chamber 10 is provided as described above. The work holding member H to which the eleven is guided is held on a pair of elevating receiving portions 21 which are elevated and lowered by the elevating device 20 provided in the quenching chamber 10. The pair of elevating receiving portions 21 are provided at required intervals, and each elevating receiving portion 21 is composed of a chain conveyor that moves the work holding member H guided to the extraction chamber 11.

Then, as shown in FIGS. 3 and 4, the pair of elevating receiving portions 21 holding the work holding member H in which the plurality of heated works W are held are lowered by the elevating device 20. The work holding member H in which the plurality of heated works W (Wa to Wd) are held is immersed in the cooling liquid X contained in the cooling liquid tank 12.

Here, in the quenching device of this embodiment, a rotating device 31 such as an electric motor is provided on the coolant tank 12, and the rotating shaft 32 rotated by the rotating device 31 is housed in the coolant tank 12. The rotary arm 34 is rotated to the fixed shaft 33 by immersing it in the liquid X and allowing the fixed shaft 33 provided upward from the bottom of the coolant tank 12 to pass through the rotary shaft portion 34a of the rotary arm 34. I try to keep it as possible.

Then, as a rotation mechanism for rotating the rotation arm 34 in the horizontal direction around the rotation shaft portion 34a, in this embodiment, the rotation shaft 32 rotated by the rotation device 31 and the rotation arm 34 are used. The sprocket 32a and 34b are provided on the rotary shaft portion 34a of the above, respectively, and the chain 35 is passed between the sprocket 32a and 34b, and the rotary shaft 32 is rotated by the rotary device 31 to rotate the sprocket 32a. , 34b and the chain 35 allow the rotary arm 34 to rotate in the horizontal direction about the rotary shaft portion 34a.

Further, in the quenching device of this embodiment, a support shaft portion 34c projecting upward is provided at the end of the rotary arm 34 extending radially from the rotary shaft portion 34a of the rotary arm 34, and the support shaft portion 34c is provided. The rotary shaft portion 36a of the rotary pedestal 36 is rotatably held by the portion 34c, and the rotary pedestal 36 is rotatably held by the end portion of the rotary arm 34.

Then, as a rotation mechanism for rotating the rotation pedestal 36 around the rotation shaft portion 36a, the end portion of the fixed shaft 33 protruding upward through the rotation shaft portion 34a of the rotation arm 34 and the end portion thereof. The sprocket 33a and 36b are provided on the rotary shaft portion 36a of the rotary cradle 36, respectively, and the chain 37 is provided on the sprocket 33a and 36b provided on the end portion of the fixed shaft 33 and the rotary shaft portion 36a of the rotary cradle 36. I'm handing it over.

Here, in the quenching apparatus of this embodiment, the work holding member H holding the plurality of heated works W as described above is immersed in the coolant X in the coolant tank 12, and the plurality of heated workpieces are immersed. When quenching W (Wa to Wd), as shown in FIGS. 3 and 4, the work holding member H is held on a pair of elevating receiving portions 21 and lowered by the elevating device 20. The work holding member H held on the pair of elevating receiving portions 21 by being immersed in the cooling liquid X housed in the coolant tank 12 is provided at one end of the rotating arm 34. It is held on the rotary cradle 36 of the above, and the elevating receiving portion 21 is further lowered to a position below the rotary arm 34, and is rotated horizontally about the rotary shaft portion 34a as described above. It is designed so as not to collide with the rotating arm 34 or the like.

Further, when lowering the pair of elevating receiving portions 21 holding the work holding member H as described above and holding the work holding member H held on the elevating receiving portion 21 on the rotary pedestal 36, When the width between the pair of elevating receiving portions 21 is made wider than the width of the rotating pedestal 36 and the work holding member H is held on the rotating pedestal 36, the pair of elevating receiving portions 21 is used as the rotating pedestal. I try not to collide with 36.

Then, after the work holding member H is held on the rotary pedestal 36 from the pair of elevating receiving portions 21 in this way, as shown in FIGS. 5A to 5D, the rotating device is as described above. The rotary shaft 32 is rotated by 31 and is centered on the rotary shaft portion 34a via a chain 35 extending over the sprocket 32a provided on the rotary shaft 32 and the sprocket 34b provided on the rotary shaft portion 34a of the rotary arm 34. The work holding member H held on the rotary cradle 36 rotatably provided at the end of the rotary arm 34 by rotating the rotary arm 34 in the horizontal direction is housed in the coolant tank 12. It is made to revolve along a horizontal orbit in the coolant X.

Further, in this way, the rotary arm 34 is rotated in the horizontal direction around the rotary shaft portion 34a, and the work holding member H held on the rotary cradle 36 revolves along the orbital trajectory in the horizontal direction. In this case, the fixed shaft 33 inserted through the rotating shaft portion 34a of the rotating arm 34 does not rotate, so that the sprocket 33a provided at the end of the fixed shaft 33 protruding from the rotating shaft portion 34a and the end of the rotating arm 34 The chain 37 spanning the sprocket 36b provided on the rotating shaft portion 36a of the rotating pedestal 36 rotatably provided causes the rotating pedestal 36 to rotate in the opposite direction to the rotating arm 34 as the rotating arm 34 rotates. The work holding member H, which is rotated and held on the rotary pedestal 36, rotates around the rotary shaft portion 36a of the rotary cradle 36 in a direction opposite to the above-mentioned revolution direction.

Here, in this embodiment, the gear ratio between the sprocket 33a provided on the fixed shaft 33 and the sprocket 36b provided on the rotating shaft portion 36a of the rotary cradle 36 is 1: 1 and the rotation occurs. While the arm 34 makes one rotation in the horizontal direction and makes one revolution of the work holding member H held on the rotation pedestal 36 along the orbital trajectory in the horizontal direction, the rotation pedestal 36 causes the rotation shaft portion 36a to rotate. The work holding member H held on the rotary cradle 36 rotates once in the direction opposite to the rotation direction with the center as the center, and as shown in FIGS. 5A to 5D, the work holding member H holds the rotary shaft portion 36a. It rotates once around the center in the direction opposite to the revolving direction, and changes by one rotation while changing the position on the inner peripheral side and the position on the outer peripheral side of the work holding member H, and is held by the work holding member H. While each of the worked works Wa to Wd is rotated in the coolant X, the distance of contact with the coolant X to be cooled is equalized, and the works Wa to Wd held by the work holding member H are in the coolant X. Will be cooled evenly in.

In this embodiment, the gear ratio between the sprocket 33a provided on the fixed shaft 33 and the sprocket 36b provided on the rotating shaft portion 36a of the rotary cradle 36 is 1: 1, but the fixed shaft 33 is provided. By changing the gear ratio between the sprocket 33a and the sprocket 36b provided on the rotary shaft portion 36a of the rotary pedestal 36, the work holding member H held on the rotary pedestal 36 by the rotary arm 34 rotates around. During one revolution along the track, the number of rotations of the work holding member H held on the rotary cradle 36 can be changed.

For example, when the gear ratio of the sprocket 36b provided on the rotating shaft portion 36a of the rotary cradle 36 is halved with respect to the sprocket 33a provided on the fixed shaft 33, as shown in FIGS. 6A to 6D. The work holding member H held on the rotary pedestal 36 is held on the rotary pedestal 36 while the work holding member H held on the rotary pedestal 36 revolves once along the orbital trajectory in the horizontal direction due to the rotation of the rotary arm 34. However, it will rotate twice around the rotation shaft portion 36a in the direction opposite to the revolution direction.

Further, in this embodiment, the rotary arm 34 extends only to one side in the radial direction from the rotary shaft portion 34a of the rotary arm 34 through which the fixed shaft 33 is inserted, and rotates to the end portion of the rotary arm 34. Although only one pedestal 36 is rotatably held, the number of rotating arms 34 extending from the rotating shaft portion 34a is not particularly limited. Although not shown, for example, the rotary arm 34 is extended to both sides in the radial direction from the rotary shaft portion 34a, and the rotary pedestal 36 is rotatably held at the end of each rotary arm 34 extending to both sides. It is also possible to rotate the rotary arm 34 in a well-balanced manner or increase the number of workpieces W to be quenched to improve the production amount.

Further, although not shown, in order to rotate the rotary pedestal 36, a rotary device that directly rotates the rotary shaft portion 36a of the rotary cradle 36 without providing a rotation transmission member such as a chain 37, sprockets 33a, or 36b. (Not shown) may be provided on the rotary arm 34.

1: Heat treatment furnace 1a: Door 10: Quenching chamber 11: Extraction chamber 12: Coolant tank 20: Elevating device 21: Elevating receiving part 31: Rotating device 32: Rotating shaft 32a: Sprocket 33: Fixed shaft 33a: Sprocket 34: Rotating Arm 34a: Rotating shaft portion 34b: Sprocket 34c: Support shaft portion 35: Chain 36: Rotating pedestal 36a: Rotating shaft portion 36b: Sprocket 37: Chain H: Work holding member W (Wa to Wd): Work X: Coolant

Claims (5)

The heated work is held by the work holding member and immersed in the coolant contained in the coolant tank provided at the bottom of the quenching chamber, and the work held by the work holding member is cooled in the coolant. In the quenching device for quenching, the work holding member is moved up and down in the quenching chamber and immersed in the coolant in the coolant tank holding the heated workpiece held by the workpiece holding member, while being immersed in the coolant. An elevating device that pulls up the work that has been immersed and cooled from the coolant, a rotary pedestal that holds the work holding member immersed in the coolant by the elevating device, and the rotary pedestal are rotatably attached. The rotary arm is rotatably attached to the rotary arm, a rotary mechanism that rotates the rotary arm to rotate the work holding member held on the rotary pedestal, and revolves the workpiece holding member along the circumferential trajectory in the coolant tank. A quenching device provided with a rotation mechanism for rotating the above-mentioned rotary cradle. The quenching apparatus according to claim 1, wherein a plurality of workpieces are held by the workpiece holding member. In the work quenching processing device according to claim 1 or 2, as a rotating mechanism for rotating a rotary cradle rotatably attached to the rotary arm, a fixed shaft for holding the rotary arm rotatably. , A quenching device characterized in that a rotation transmission member is provided between the rotary arm and the rotary cradle rotatably attached to the rotary arm. In the work quenching processing apparatus according to claim 3, as the rotation transmission member, sprockets are provided on the fixed shaft and the rotation pedestal, respectively, and the sprocket and the rotation pedestal provided on the fixed shaft are provided. A quenching device characterized by being provided so that a chain can be hung over a sprocket. In the work quenching processing apparatus according to any one of claims 1 to 4, the rotary arm is horizontally rotated in the coolant tank by the rotary mechanism and held on the rotary cradle. A quenching device characterized in that a work holding member is revolved along a horizontal orbit in a coolant tank.

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